I have a Mage (60) and Druid (31). I have my FuBars with each set to a class profile, thus each character is on a different profile.

However, whenever I enable ExperienceFu with my Druid (since he's still leveling), and then load my Mage, ExperienceFu will inevitably be loaded (usually as a minimap icon). If I then disable it (since my mage has no need for it at level 60), it's disabled within my Druid profile as well.